Error processing update packet (NXRRSET)

[Kevin Darcy]

The log message is a little misleading. NXRRSET isn't really an "error", just a
response code indicating that a prerequisite wasn't met. What happened here is
that an update was requested with the prerequisite that a particular RRset
existed, but the RRset didn't actually exist so the update was declined.

In case you're not already aware, an "RRset" refers to some number of records
in DNS which all have the same name, type and class. Each RRset is identical to
or a proper subset of a "domain name", which can potentially own records of
multiple types.


- Kevin

"England, Robert (Robert)" wrote:

> Hello,
>
> I believe the following errors are caused by Windows 2000 client that are
> trying to register there host names in DNS, most of these messages are
> generated from the Windows 2000 client using dial-in or VPN, does that have
> anything to do with it?. Is there any way to suppress these messages? They
> generate a lot of messages in our /var/adm/messages.
>
> I have looked in the
> <http://www.acmebw.com/askmrdns/bind-messages.htm#idx_e>
> http://www.acmebw.com/askmrdns/bind-messages.htm#idx_e document to see what
> they say. The error states severity as ERROR.
> What is the impact on our DNS servers receiving these errors?
>
> Can someone help me better understand what is really trying to occur here?
>
> A dynamic update from the IP address 192.68.20.116 failed because it
> included a prerequisite that a certain record type not exist for a domain
> name.  That record type did exist, so the name server didn't process the
> update.
>
> 1. What it the prerequisite this explanation talks about?
> 2. What is the record type?
> 3. NXRRSET = Non Existing Resource Record Set?  Is this what NXRRSET is
> telling me? And what RR Set does it refer to?
>
>
> Dec 14 14:00:09 pa101030-us-qip01 named[257]: error processing update packet
> (NXRRSET) id 3 from [135.15.196.250].1027
> Dec 14 14:00:09 pa101030-us-qip01 named[257]: error processing update packet
> (NXRRSET) id 163 from [135.149.250.31].1285
> Dec 14 14:00:18 pa101030-us-qip01 named[257]: error processing update packet
> (NXRRSET) id 667 from [135.149.250.23].2492
> Dec 14 14:01:08 pa101030-us-qip01 named[257]: error processing update packet
> (NXRRSET) id 3 from [135.149.250.19]
>
>
> error processing update packet (NXRRSET) id 3 from [xxx.xxx.xxx.xxx].1163
> CATEGORY: update
> SEVERITY: error
> PAGE:
> FURTHER INFO:
>
> Thanks for all the help!!!
>
> Bob
>
>